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User’s Guide
RVB-2
Rotational Viscometer
MADE IN CHINA
Servicing North America:
U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047
ISO 9001 Certified Stamford, CT 06907-0047 USA
Toll Free: 1-800-826-6342 TEL: (203) 359-1660
FAX: (203) 359-7700 e-mail: [email protected]
Canada: 976 Bergar
Laval (Quebec), H7L 5A1 Canada
Toll-Free: 1-800-826-6342 TEL: (514) 856-6928
FAX: (514) 856-6886 e-mail: [email protected]
For immediate technical or application assistance:
U.S.A. and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA
®
Customer Service: 1-800-622-2378/1-800-622-BEST
®
Engineering Service: 1-800-872-9436/1-800-USA-WHEN
®
Mexico/ TEL: 001 (203) 359-1660 FAX: 001 (203) 359-7700
Latin America e-mail: [email protected]
Servicing Asia:
China: 1698 Yi Shan Road, Unit 102,
Min Hang District, Shanghai, China
Hotline: 800 819 0559/400 619 0559 e-mail: [email protected]
Servicing Europe:
Benelux: Toll-Free: 0800 099 3344 TEL: +31 20 347 21 21
FAX: +31 20 643 46 43 e-mail: [email protected]
Czech Republic: Frystatska 184
733 01 Karviná, Czech Republic
Toll-Free: 0800-1-66342 TEL: +420-59-6311899
FAX: +420-59-6311114 e-mail: [email protected]
France: Toll-Free: 0805 541038 TEL: 01 57 32 48 17
FAX: 01 57 32 48 18 e-mail: [email protected]
Germany/ Austria: Daimlerstrasse 26
D-75392 Deckenpfronn, Germany
Toll-Free: 0800 8266342 TEL: +49 (0) 7056 9398-0
FAX: +49 (0) 7056 9398-29 e-mail: [email protected]
United Kingdom: OMEGA Engineering Ltd.
ISO 9001 Certified One Omega Drive, River Bend Technology Centre, Northbank
Irlam, Manchester M44 5BD United Kingdom
Toll-Free: 0800-488-488 TEL: +44 (0) 161 777-6611
FAX: +44 (0) 161 777-6622 e-mail: [email protected]
OMEGAnet
®
Online Service Internet e-mail
omega.com info@omega.com
It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any
errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.
RVB-2
Rotational Viscometer
Operation Manual
1
Content
I. Summary………………………………………………………..2
II. Main technical specification……………………………………2
III. Working principle………………………………………………2
IV. Instrument structure and installation……………………………3
V. Operation procedure…………………………………………….6
VI. Notes…………………………………………………………8
VII. Full set and technical documents ................................................... 10
2
The instrument is a precise instrument, please read the Operator’s Manual
before using.
I. Summary
The RVB-2 Rotation Viscometer uses advanced mechanical design technology,
manufacturing techniques and compute controlling technology, enabling it to collect
data accurately. The white background light and ultra-bright LCD make the RVB-2
display clear and easy to read. Equipped with a special print interface, the RVB-2 can
print out measurement data through a local printer.
The RVB-2 is a highly sensitive, reliable, and convenient instrument. The
RVB-2 is used to determine absolute viscosity of Newton liquids and apparent
viscosity of Non-Newton liquids. It is widely used to determine the viscosity of
liquids such as greases, oil paints, plastic, pharmaceutials, dopes, adhesive solvents
and washing solvents.
II. Main technical specification
1. Measurement range: 102000000 cps
2. Rotor specification: No.14, total four types of rotors
3. Rotation speed of rotor: 0.3, 0.6, 1.5, 3, 6, 12, 30, 60 r/min; total 8 grades
4. Measurement error: ±3% (F·S)
5. Power supply: AC 120 V±10%, 50 Hz±10%, 230V ±10%, 60
6. Ambient temperature: Temperature 5°35°C (41°95°F)
7. Relative humidity: not more than 80%
III. Working principle
The RVB-2 is a rotation Viscometer. The motor is used to drive and regulate the
constant speed of the rotor. When rotated the liquid will produce a viscidity moment.
The higher the viscosity of liquids, the higher the viscidity moment and the lower the
viscosity of liquids, the lower the viscidity moment. The viscidity moment is
determined by a sensor, and the viscosity of measured liquids is calculated by the
processor.
3
The RVB-2 can carry out data processing for the data determined by the sensor,
and display the set rotor number, rotation speed, viscosity, and full scale percent of
measured liquids.
The instrument has 4 rotors (1, 2, 3 and 4) and 8 grades of rotation speed (0.3,
0.6, 1.5, 3, 6, 12, 30 and 60 r/min), offering 32 different combinations for measuring
the viscosity of liquids within the measurement range.
IV. Instrument structure and installation
(I) Structure
The structure of the instrument is shown as Figure 1.
(1) Water level bubble on the head of the viscometer (2) LCD (3) Outer shield
(4) Protection holder of rotor (5) Pedestal of main unit (6) Micro-printer
(7) Head of viscometer (8) Operation keyboard (9) Joint of rotor (10) Rotor
(11) Level regulation knob on the pedestal of main unit
(II) Installation
1. Check power supply to ensure it meets local regulations.
2. The instrument should be installed on a workbench without corrosive gas,
1
4
electromagnet interference or vibration.
3. Screw the toothed vertical shaft in the screw hole on the pedestal of the main
unit. The toothed surface should face to the front of the pedestal. Secure nut onto
vertical shaft using a wrench, to avoid any rotation of the vertical shaft. (Figure 2)
4. Install the positioning knob for the viscometer head on the vertical shaft
(Figure 2). Rotate the knob to move the viscometer head up and down. If the knob is
too tight or too loose, adjust the bolt on the lower surface of the clamps. When
moving the head of viscometer to a proper position, screw the dead bolt on the back
of knobs to fasten the head of viscometer.
5. Remove the locknut from the yellow protection cap and remove the protection
cap.
6. Level the viscometer head on the pedestal using the knobs.
7. Connect the power supply and printer shown as Figure 3.
Note: the “PC interface” in the figure 3 is not used at present.
5
Figure 2
Figure 3
Viscometer head
Level adjust bolt
Water level bubble
Dead bolt
Postioning knob
Adjusting bolt
Hexagon nut
Toothed vertical shaft
Clamps
Pedestal
6
V. Operation procedure
1. Prepare the measured sample. Place the liquid in a beaker or container,
whose diameter is not less than 70 mm (2.76 in), and height is not less than 125 mm
(5 in).
2. Correctly control the temperature of measured liquids.
3. Adjust the level of the instrument and check the bubble of the water level
meter to ensure the viscometer is level.
4. Choose a suitable rotor and rotation speed according to the estimated viscosity
of the liquids.
5. Adjust the up and down knobs slowly to adjust the height of rotor in the
measured liquid until the liquid surface sign on the rotor is equal with the liquid
surface.
6. Keyboard operation and indication interface
(1) The keyboard of the instrument is shown as figure 4.
Figure 4 Figure 5
(2) Turn on the power supply switch on the back of the instrument and enter into
the user choice mode as shown in figure 5. The cursor is at the “1#”. Press “right
move” button to choose the required rotor.
(3) Press “down” button to switch to rotation speed item. The cursor is at the
item 0.3 r/min shown as in the figure5.
Press “right move” button to choose required speed. There are 8 grades of
rotation speeds, 0.3, 0.6, 1.5, 3, 6, 12, 30 and 60 r/min.
(4) Press “ok” button after choosing the suitable rotor and rotation speed. The
Reset ok
Rotor: 1#
Rotation speed: 0.3 r/min
Output Communication
Clock Display
7
rotor will begin to rotate and the instrument will begin to measure. The display is
shown as figure 6.
Figure 6
In figure 6, the unit of rotation speed is RPM. The unit of viscosity is mPa·s (cps).
The vertical bar on the right side indicates the course of sampling. The percent ratio is
the ratio between the measured viscosity and the full scale.
(5) In figure 5, when adjusting the cursor to the “output” position, press the
“right move” button to choose “communication” and “print”. Press “ok” button at the
“print” position, and it will print the test data through a printer. The function of
“communication” is not used.
(6) In figure 5, when moving the cursor to the “clock” position, press “right
move” button, and choose “indicate” and “modify”. If the “ok” button is pressed at
“display” position, it will indicate the hour: minute: second –year-month-day at
present. If the “ok” button is pressed at “modify” position, the time and data can be
modified.
(7) Press “reset” button and the instrument will stop measuring. Press the “ok”
button, to resume measuring the viscosity of sample using the previous rotor number
and rotation speed.
7. Operation instruction
(1) Estimate the viscosity range of measured liquids and choose a suitable rotor
and rotation speed as per the full scale sheet shown in table 1.
(2) If the viscosity of the measured liquid can not be estimated, take the viscosity
Rotor 1 #
Rotation speed 0.3 RPM
Viscosity ××× mPa·s
Percent ratio ×××.×%
8
of measured liquids as a high viscosity. Then choose a rotor from small to large (the
number is from high to low) and a rotation speed from slow to fast. In principle,
choose a small rotor (high rotor number) and slow rotation speed to determine high
viscosity liquids, and choose a large rotor (low rotor number) and rapid rotation speed
to determine low viscosity liquids.
(3) In order to ensure the measurement precision, the full scale percent should be
at 10%100% during measurement. If the displayed value flitters, the reading is too
large or too small, and the scale of the rotor should be adjusted.
(4) Press “reset” button at any time, the program will revert to the initial state,
and the operation interface will revert to user choosing state.
8. Full scale sheet
rotor
Full scale
mPa·s
r/min
Rotation speed
1
2
3
4
60
100
500
2000
10000
30
200
1000
4000
20000
12
500
2500
10000
50000
6
1000
5000
20000
100000
3
2000
10000
40000
200000
1.5
4000
20000
80000
400000
0.6
10000
50000
200000
1000000
0.3
20000
100000
400000
2000000
VI. Notes
1. The power supply should be within the error limit of the voltage and
frequency, or it will affect the test precision.
2. Please assemble and disassemble the rotor carefully. Remember to raise the
connection bolt at the lower section of the instrument prior to assembly and
disassembly. To avoid bending the rotor, do not handle it with excessive force or push
the rotor transversely. Keep the connection surface and screw thread of connection
bolt, and rotor clean, or they will affect installation, and stability of rotor when
9
rotating.
4. Do not let the rotor rotate without any liquids to avoid destroying the axle
point and bearing.
5. Please clean the rotor immediately after using. Disassemble the rotor to clean
it. Do not clean the rotor when still installed in the instrument. The rotor should be
stored in the storage case after cleaning.
6. Please cover the yellow protection cap and raise the connection bolt, and
screw on the dead bolt on the protection cap tightly during carrying or transporting the
instrument.
Note: The protection cap should be disassembled before connecting to power
supply to avoid destroying the instrument.
7. Do not disassemble the instrument or replace the accessory of the instrument.
Do not add lubricating oil.
8. Most suspending liquids, emulsion, high polymer and other high viscosity
liquids are “Non-Newton liquid”. The apparent viscosity of these mediums always
changes following the change of shear speed and time. When determining the
viscosity of sample using a different rotor, rotation speed and at different times, it is
normal that the viscosity will be different.
9. Do not lay the instrument in its side or transversely.
10. Perform the tests using the following guidelines:
A. Control the temperature of measured liquids.
Note: you can purchase the circulation constant temperature water bath and a
special two layer sample cup if necessary.
B. Submerge the rotor in the measured liquids for a long time and keep the
temperature of the liquid constant to let the temperature of the rotor and measured
liquid equal.
C. Ensure the uniformity of measured liquids.
D. Place the rotor in the center of the container during measurement.
E. Carry out measurement using the protection holder.
F. Keep the rotor clean.
10
G. Prevent any bubbles from adhering to the rotor when immersed in the
measured liquids.
VII. Full set and technical documents
1. Full set
No
Name
Unit
Quantity
1
Main unit of NDJ-1B Digital Rotation Viscometer
Set
1
2
No.14 rotor
Piece
1 for each
3
Protection sleeve
Piece
1
4
Standing pole
Piece
1
5
Pedestal (including three pieces of level adjust bolts)
Pair
1
6
Rotor protection holder
Piece
1
7
Power supply wire (120 V 6 A)
Piece
1
8
Printer (including connection cable, power supply wire)
Set
1
9
Aluminum case (it contains main unit, rotor and rotor
protection holder, etc)
Piece
1
2. Optional parts
(1) HWY-10 Circulation constant temperature water bath
(2) Special double layers sample cup
NOTES:
WARRANTY/ DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be
as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE,
AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/ DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.
FOR WARRANTY
RETURNS, please have the
following information available BEFORE
contacting OMEGA:
1. Purchase Order number under which the product
was PURCHASED,
2. Model and serial number of the product under
warranty, and
3. Repair instructions and/or specific problems
relative to the product.
FOR NON-WARRANTY REPAIRS,
consult OMEGA
for current repair charges. Have the following
information available BEFORE contacting OMEGA:
1. Purchase Order number to cover the COST
of the repair,
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2013 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.
M5240/0113
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